I thought there was enough fish and bread to serve all the people there. I'm sure they already had fruits, berries and an assortment of the likes already. Sounds like a very healthy meal to me. And he even gave them wine to wash it down. Now consider that this was in the year 20-30 something and you'll notice how good they had it considering the living standards back then.
On the other hand, you're acting as if you believe such a thing really happened which makes me question your sanity.
I don't know all the rules to kosher food but imo there's just way too many. Nothing wrong with slightly processed food. That falls down to people making the wrong choices.